Use String[] for types and add test for supported types

lib/connector.js

@@ -17,12 +17,12 @@ function Connector(name, settings) {
  */
 Connector.prototype.relational = false;
 
-/*!
- * Get the connector type/subtype
- * @returns {String} The type for the connector
+/**
+ * Get types associated with the connector
+ * @returns {String[]} The types for the connector
  */
-Connector.prototype.getType = function() {
-  return 'db/nosql';
+Connector.prototype.getTypes = function() {
+  return ['db', 'nosql'];
 };
 
 /**
@@ -33,6 +33,26 @@ Connector.prototype.getDefaultIdType = function() {
   return String;
 };
 
+/**
+ * Get the metadata for the connector
+ * @returns {Object} The metadata object
+ * @property {String} type The type for the backend
+ * @property {Function} defaultIdType The default id type
+ * @property {Boolean} [isRelational] If the connector represents a relational database
+ * @property {Object} schemaForSettings The schema for settings object
+ */
+Connector.prototype.getMedadata = function () {
+  if (!this._metadata) {
+    this._metadata = {
+      types: this.getTypes(),
+      defaultIdType: this.getDefaultIdType(),
+      isRelational: this.isRelational || (this.getTypes().indexOf('rdbms') !== -1),
+      schemaForSettings: {}
+    };
+  }
+  return this._metadata;
+};
+
 /**
  * Execute a command with given parameters
  * @param {String} command The command such as SQL

lib/connectors/memory.js

@@ -39,8 +39,8 @@ Memory.prototype.getDefaultIdType = function() {
   return Number;
 };
 
-Memory.prototype.getType = function() {
-  return 'db/nosql/memory';
+Memory.prototype.getTypes = function() {
+  return ['db', 'nosql', 'memory'];
 };
 
 Memory.prototype.connect = function (callback) {

lib/datasource.js

@@ -569,20 +569,53 @@ DataSource.prototype.mixin = function (ModelCtor) {
   });
 };
 
+/**
+ * @see ModelBuilder.prototype.getModel
+ */
 DataSource.prototype.getModel = function (name, forceCreate) {
   return this.modelBuilder.getModel(name, forceCreate);
 };
 
+/**
+ * @see ModelBuilder.prototype.getModelDefinition
+ */
 DataSource.prototype.getModelDefinition = function (name) {
   return this.modelBuilder.getModelDefinition(name);
 };
 
 /**
- * Get the data source type
- * @returns {String} The data source type, such as db/relational, db/nosql, rest
+ * Get the data source types
+ * @returns {String[]} The data source type, such as ['db', 'nosql', 'mongodb'],
+ * ['rest'], or ['db', 'rdbms', 'mysql']
  */
-DataSource.prototype.getType = function() {
-  return this.connector && this.connector.getType();
+DataSource.prototype.getTypes = function () {
+  var types = this.connector && this.connector.getTypes() || [];
+  if (typeof types === 'string') {
+    types = types.split(/[\s,\/]+/);
+  }
+  return types;
+};
+
+/**
+ * Check the data source supports the given types
+ * @param String|String[]) types A type name or an array of type names
+ * @return {Boolean} true if all types are supported by the data source
+ */
+DataSource.prototype.supportTypes = function (types) {
+  var supportedTypes = this.getTypes();
+  if (Array.isArray(types)) {
+    // Check each of the types
+    for (var i = 0; i < types.length; i++) {
+      if (supportedTypes.indexOf(types[i]) === -1) {
+        // Not supported
+        return false;
+      }
+    }
+    return true;
+  } else {
+    // The types is a string
+    return supportedTypes.indexOf(types) !== -1;
+  }
 };
 
 /**

lib/model-builder.js

@@ -71,6 +71,11 @@ ModelBuilder.prototype.getModel = function (name, forceCreate) {
   return model;
 };
 
+/**
+ * Get the model definition by name
+ * @param {String} name The model name
+ * @returns {ModelDefinition} The model definition
+ */
 ModelBuilder.prototype.getModelDefinition = function (name) {
   return this.definitions[name];
 };

lib/sql.js

@@ -19,12 +19,12 @@ util.inherits(BaseSQL, Connector);
  */
 BaseSQL.prototype.relational = true;
 
-/*!
- * Get the connector type/subtype
- * @returns {string}
+/**
+ * Get types associated with the connector
+ * @returns {String[]} The types for the connector
  */
-BaseSQL.prototype.getType = function() {
-  return 'db/relational';
+ BaseSQL.prototype.getTypes = function() {
+  return ['db', 'rdbms', 'sql'];
 };
 
 /*!

test/loopback-dl.test.js

@@ -479,6 +479,42 @@ describe('Load models with base', function () {
   });
 });
 
+describe('DataSource connector types', function() {
+  it('should return an array of types', function() {
+    var ds = new DataSource('memory');
+    var types = ds.getTypes();
+    assert.deepEqual(types, ['db', 'nosql', 'memory']);
+  });
+
+  it('should test supported types by string', function() {
+    var ds = new DataSource('memory');
+    var result = ds.supportTypes('db');
+    assert(result);
+  });
+
+  it('should test supported types by array', function() {
+    var ds = new DataSource('memory');
+    var result = ds.supportTypes(['db', 'memory']);
+    assert(result);
+  });
+
+  it('should test unsupported types by string', function() {
+    var ds = new DataSource('memory');
+    var result = ds.supportTypes('rdbms');
+    assert(!result);
+  });
+
+  it('should test unsupported types by array', function() {
+    var ds = new DataSource('memory');
+    var result = ds.supportTypes(['rdbms', 'memory']);
+    assert(!result);
+
+    result = ds.supportTypes(['rdbms']);
+    assert(!result);
+  });
+
+});
+
 describe('DataSource constructor', function () {
   // Mocked require
   var loader = function (name) {